Honda CB1000RA 2019 Manual page 148

Caring for Your Motorcycle
Aluminum Components
Aluminum will corrode from contact with dirt,
mud, or road salt. Clean aluminum parts regularly
and follow these guidelines to avoid scratches:
Do not use stiff brushes, steel wool, or
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cleaners containing abrasives.
Avoid riding over or scraping against curbs.
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Cylinder Head/Sprocket Hub/Right
Engine Cover
The cylinder head, sprocket hub and right engine
cover contain part of non-surface treated.
To avoid corrosion and discoloration, apply a
coat of wax not including abrasives.
If the non-surface treated parts have corroded,
polish them using a wax including abrasives.
Do not clean the painted parts using the wax
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including abrasives.
Do not use stiff brushes, steel wool, or sand
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paper.
Do not use acidic or alkaline detergent.
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Cylinder head
Right engine cover
Sprocket hub